|
|
|
| Effect of intercritical deformation on tensile performanceof a low?carbon Si–Mn steel processed by quenching and bainitic partitioning |
| Ya-qiang Tian1, Zhong-qian Cao1, Wang Li1, Hong-bo Pan2, Xiao-ping Zheng1, Jin-ying Song1, Ying-li Wei1, Lian-sheng Chen1 |
| 1 Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan 063210, Hebei, China;2 Key Laboratory of Metallurgical Emission Reductionand Resources Recycling of Ministry of Education, Anhui University of Technology, Ma’anshan 243002, Anhui, China |
|
|
|
|
Abstract The effect of intercritical deformation on retained austenite and tensile performance of a low-carbon Si–Mn steel in modi- fied quenching and bainitic partitioning processes was evaluated. The results showed that the intercritical deformation can play a positive role in stabilizing and refining the retained austenite, and possessed promising potential in balancing tensile strength and ductility of multiphase high-strength steels. The experimental low-carbon Si–Mn steel exhibited multiphase configuration comprising polygonal ferrite, granular bainite and granular structure after two different modified quenching and bainitic partitioning processes, and the bainitic ferrite laths got refined by intercritical deformation. The volume fraction of retained austenite in film-like and blocky morphology was increased from 11.5% to 13.9% due to applied intercritical deformation, and the larger amount of retained austenite provided the sufficient transformation-induced plasticity effect and resulted in enhanced work hardening degree; in response, enhanced ultimate tensile strength 1260 MPa and fracture elongation 22.1% were obtained, leading to increased product of strength and elongation in value of 27.7 GPa% compared to 20.8 GPa% of undeformed structure.
|
|
|
|
|
|
| Cite this article: |
|
Ya-qiang Tian,Zhong-qian Cao,Wang Li, et al. Effect of intercritical deformation on tensile performanceof a low?carbon Si–Mn steel processed by quenching and bainitic partitioning[J]. Journal of Iron and Steel Research International, 2020, 27(2): 208-216.
|
|
|
|
| [1] |
Yu-cheng Zhang, Yang Meng, Gui-bin Cui, Hui-ping Jia, Xin-hua Ju, Zhong-hang Jiang, Ze-jun Ma. Analysis of retained austenite in TRIP590 steel by electron backscattered diffraction method[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2020, 27(3): 355-365. |
| [2] |
Jun-hui Li, Hong-hong Wang, Qiang Luo, Li Li, Chao Sun, R.D.K. Misra . Correlation between microstructure and impact toughness of weld heat-affected zone in 5 wt.% manganese steels[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(7): 761-770. |
| [3] |
Hui-bin Wang, Fei-long Wang, Gen-hao Shi, Yu Sun, Jiang-cheng Liu, Qing-feng Wang, Fu-cheng Zhang. Effect of welding heat input on microstructure and impact toughness in CGHAZ of X100Q steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(6): 637-646. |
| [4] |
Cheng-hui Su · Qiang-guo Li · Xue-fei Huang · Wei-gang Huang. Effect of bainite microstructure during two-step quenching and partitioning process on strength and toughness properties of a 0.3%C bainitic steel[J]. , 2018, 25(2): 235-242. |
| [5] |
Hui Zheng, . Wei Li , . Yu Gong, . Li Wang . Xue-jun Jin,. Microstructure-based finite element modeling of effect of metastable austenite on mechanical properties of quenching and partitioning (Q&P) 980 steel[J]. , 2018, 25(11): 1140-1148. |
| [6] |
Xiao-li Zhao,,Yong-jian Zhang,Cheng-wei Shao,Wei-jun Hui,Han Dong. Thermal stability of retained austenite and mechanical properties of medium-Mn steel during tempering treatment[J]. Chinese Journal of Iron and Steel, 2017, 24(8): 830-837. |
|
|
|
|
2020, Vol. 27 
